Team:Aachen/Notebook/Protocols/Culture medium and conditions

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(Culture Medium)
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Revision as of 00:11, 17 October 2014

Culture Media

Media

Luria-Bertani Medium (LB)

  1. weight components
    5 g/L NaCl
    10 g/L tryptone
    5 g/L yeast extract
    (15 g/L agar for plates)
  2. fill up to 1 L with deionized water
  3. mix well by shaking
  4. autoclave
    1. autoclaving tape, caps slightly unscrewed
    2. base of the pot has to be covered with deionized water
    3. close lid
    4. heat level 3 until the pressure valve opens
    5. reduce heat level to 1.5
    6. set timer to 20 minutes
    7. turn heater off
    8. wait until the pressure valve retracts (30-45 minutes)
    9. open, close caps & shake
  5. for plates, wait until you can touch the bottle (<60 °C, clean bench!)
  6. add antibiotics (1 µL/mL) and shake (gloves!)

TB Medium

  1. components 1:
    4 mL/L glycerol
    12 g/L tryptone
    24 g/L yeast extract
  2. fill up to 900 mL with deionized water
  3. mix well by shaking
  4. autoclave
  5. components 2:
    0.17 M KH2PO4
    0.72 M K2HPO4
  6. dissolve in 100 mL deionized water and sterilize it by passing it through a filter
  7. after autoclaving and cooling down, add sterile phosphate solutions


Hartmans Minimal Medium (HM)

This mineral salts medium is based on (Hartmans et al., 1989).

Three 100x stock solutions are prepared according to the following recipe and stored at 4°C:

  • 100x Buffer,composed of 388 g dipotassium phosphate, 212g monosodium phosphate dihydrate per Liter, adjusted to a pH of 7.0 and sterilized by autoclaving.
  • 100x ammonium sulfate composed of 200 g/l ammonium sulfate and sterilized by autoclaving.
  • 100x MM salts
  1. Add 1 g EDTA to 25 ml water.
  2. Add drops of 10 M sodium hydroxide until EDTA is completely dissolved.
  3. Adjust pH back to 4.0 with concentrated hypochloric acid.
  4. Fill up with water to 800 ml and dissolve following components:
    1. 10 g magnesium chloride sexahydrate
    2. 200 mg zinc sulfate heptahydrate
    3. 100 mg calcium chloride dihydrate
    4. 500 mg iron(II) sulfate heptahydrate
    5. 20 mg sodium molybdate dihydrate
    6. 20 mg copper(II) sulfate quintahydrate
    7. 40 mg cobalt(II) chloride sexahydrate
    8. 100 mg manganese(II) chloride sexahydrate

For 1x medium without carbon source, pool 10 ml of each 100x stock solution and fill up to 1000 ml with sterile, deionized water and store at 4°C.

M9 Minimal Medium (M9)

Components for 1 L Volume
bidest. water 778.667 mL
10x Salt solution 100 mL
Magnesiumsulfatehaptahydrate (10 mM) 100 mL
Glucose 20% (w/v) 20 mL
1000x Trace elements 1 mL
Thiamin (1 mM) 0.333 mL


10x Salt solution
Component' Final concentration Concentration in stock solution
BisTris 95 mM 200,000 mg/L
Ammmonium chloride 60 mM 32,100 mg/L
Sodium citrate 12.5 mM 27,000 mg/L
Monopotassium phosphate 3 mM 4,170 mg/L
Dipotassium phosphate 0.7 mM 1,590 mg/L
1000x Trace elements
ComponentFinal concentration Concentration in stock solution
Iron(III) chloride 50 mM 13,515 mg/L
Calcium chloride 20 mM 2,220 mg/L
Manganese(II) chloride 10 mM 1,258 mg/L
Zinc sulfate 10 mM 1,615 mg/L
Cobalt(II) chloride 2 mM 260 mg/L
Copper(II) chloride 2 mM 269 mg/L
Nickel(II) chloride 2 mM 259 mg/L
Sodium molybdate 2 mM 412 mg/L
Sodium selenite 2 mM 346 mg/L
Boric acid 2 mM 124 mg/L
Hydrochloric acid 1 mM 20 mL

Nutrient Agar medium (NA)

Super Optimal broth with Catabolite repression medium (SOC)

  1. components
    0,5 % yeast extract
    2 % tryptone
    10 mM NaCl
    2.5 mM KCl
    20 mM MgSO4
  2. fill up with deionized water
  3. adjust to pH 7.5 with NaOH
  4. after autoclaving, add 20 mM sterile glucose solution (filter sterilization)